That's not true. They eat it because there's still some type of food content in there that was not completely digested inside and once they poop it out out, that smells good to them and it's actually not bad for them

Run across a bridge right when cars were coming at ~35mph just for the thrill of it, I'm surprised we didn't get ran over.. well that was the point of "the game".. to bot get ran over. My 4 cousins and I would all do this.